Roller head for cement pipe forming



C. B. PAUSCH ROLLER HEAD FOR CEMENT PIPE FORMING Oct. 4, 1966 5 Sheets-Sheet 1 Filed April 20, 1964 I NVENTOR.

CHAELE 5 P40561 1 BY g M A TTORNEY C. B. PAUSCH ROLLER HEAD FOR CEMENT PIPE FORMING Oct. 4, 1966 5 Sheets-Sheet .2

Filed April 20, 1964 INVENTOR. CH/JRL E5 51 P405679 HTTORNEY Oct. 4, 1966 c. B. PAUSCH 3,276,091

ROLLER HEAD FOR CEMENT PIPE FORMING Filed April 20, 1964 5 Sheets-Sheet 5 I 33 Z7 Z5 v INVENTOR.

044/245 5. PA 1/504 Zfi A TTOEA/E Y 3,276,091 ROLLER HEAD FOR CEMENT PIPE FORMING Charles B. Pausch, P.O. Box 758, Mecca, Calif. Filed Apr. 20, 1964, Ser. No. 361,154 2 Claims. (Cl. 25-36) This invention relates to a roller head device for forming cement, concrete, or other aggregate pipes in molds, said head constituting the means which forms the inner surface of the pipe. The form of the outer surface is produced by the inner face of the mold, and the ends of the pipe are formed by upper and lower pallets. The present invention is particularly directed to the roller head device arranged to be operatively movable in a mold provided with upper and lower pallets.

It is conventional to dispose such molds on the base of a concrete pipe machine that is provided with a vertically movable crosshead that is provided with a vertical driven shaft to the lower end of which a packer head is attached. With the packer head moved to its lowermost position so the top'thereof is at or below the level of the lower pallet, cement or concrete is fed to the interior of the mold. Now, as the crosshead is raised, causing the packer headto be raised, the same, while rotating, packs said cement or concrete against the inner surface of the mold, thereby forming the pipe. When the packer head reaches the upper pallet, the pipe is completed. Said packer head is then withdrawn from the finished pipe and the form thus provided with a molded pipe is replaced by an empty form and the pipe-molding process is repeated. After the cement or concrete of the pipe has set, thepallets are removed and the pipe extracted from the form.

An object of the present invention is to provide a novel, improved and efiicient packer device to replace the common packer heads and is in the form of a roller head that combines slinger, packer and smoothing or troweling means that cooperate to form cement or concrete pipe in an expeditious manner.

Another object of the invention is to provide a roller head of the character referred to that is fully adjustable for efficiently packing aggregate varying greatly in fluidity and composition to, thereby, insure desired solidity of the pipe walls.

A further object of the invention is to provide a roller head that minimizes splatter of cement on the troweled surface of the pipe wall.

A still further object of the invention is to provide a roller head, as above characterized, that guards against wear of the troweling or smoothing casing or skirt.

This invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description, and which is based on the accompanying drawings. However, said drawings merely show, and the following description merely describes, preferred embodiments of the present invention, which are given by way of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

FIG. 1 is a broken vertical sectional view of a pipemolding form with a roller head according to the present invention in the process of forming a cement or concrete pipe, the roller head being shown partly in elevation and partly in vertical section.

FIG. 2 is an enlarged plan view of the roller head with its mounting shaft in cross-section.

United States Patent FIG. 3 is va vertical sectional view of said roller head as taken on the line 33 of FIG. 2.

FIG. 4 is a fragmentary plan view of a modification.

FIGS. 5 and 6 are fragmentary vertical sectional views taken on the respective lines 55 and 66 of FIG. 4.

The form 5 that is shown in FIG. 1 comprises a form liner 6 provided with a bell bottom 7 which sits upon a bottom pallet 8 on the base 9 of a cement pipe machine, and a top pallet 10 capped by a top form holder 11. It will be understood that the form 5, or one similar to the form above described, has a fixed position with its center coaxial with the shaft 12 of the pipe machine, said shaft being driven at an exemplary speed of 250 rpm, preferably in a counter-clockwise direction, according to the arrow 13. Also, the shaft 12 and the sleeve 14, in which it has bearing, are vertically movable, as indicated in the preamble above. Pipe machines that use vertical forms, as above, provide means for feeding cement or concrete into the form, as suggested at 15, said material falling gravitationally through the annulus formed by the top pallet 10.

The present roller head 16 is suspended from the shaft 12 and has a maximum diametral size that is equal to the inner diameter of the cement or concrete pipe 17 that will be centrifugally cast by said head 16.

The roller head 16 comprises, generally, a troweling cylinder 18 of the diametral size above mentioned, means 19 to connect said cylinder 18 to the end of the shaft 12 so that the cylinder will rotate with the shaft, a set of packer units 20 extending upwardly from said cylinder 18, means 21 mounting said uni-ts adjustably eccentrically on the troweling cylinder, and a cement spreader or slinger unit 22 vertically adjustably carried by said cylinder.

The troweling cylinder 18 comprises a cylindrical skirt portion 25, a head plate 2-6 connected by bolts 27 to inreaching lugs 28 in the upper end of the skirt portion 25, and a hub 29 extending from the center of said head plate and provided with a bore 30 having a keyway 31.

The connecting means 19 is shown as a spud having a portion 32 shouldering on the end of the hub 29, a diametrally smaller portion 33 extending from one end of the portion '32 and fitted into the bore 30 of said hub, a key 34 on said portion 33 and engaged in the keyway 31, and an externally threaded extension 35 on the opposite end of the portion 32 and engaged with the shaft 12. A threaded stud 36 on the end of the spud portion 33 extends through a collar 37 welded to the under face of the head plate 26 is engaged by a nut 38 which secures the smoother cylinder 18 to the spud.

Four packer units 20 are shown, the same being arranged around the marginal portion of the cylinder 18. Each unit comprises a vertical stud 39 which, by antifriction bearings 40, rotationally mounts a packer cylinder 41 that has an upper closure plate 42. Said cylinders 41 have smooth outer walls and are freely rotational on the studs 39. An O-ring seal 39a may be provided between the stud and the cylinder to protect the bearings 40.

The mounting means 21 is shown as eccentric tapered extensions 43 on the ends of the studs 39, the same being fitted in tapered bores 44 in thehead plate 26. Nuts 45 tighten the extensions 43 in the bores 44. It will be clear from FIG. 3 that the axes 46 of the cylinders 41 can be adjusted to bring the outer faces of the cylinders tangent to or inwardly or outwardly displaced relative to the outer peripheral face of the skirt portion 25 merely by loosening the nuts 45, rotating the studs 39 on the axes of the tapered extensions 43, and then tightening said nuts. Thus, the outer surfaces of the cylinders 41 are arranged to pack cement or concrete for subsequent troweling or smoothing engagement by the cylinder 18.

Said packer unit-s rotate in a clockwise direction (arrows 47) to track around and pack the cement or concrete to form a tubular wall 48 While the troweling cylinder 16 is being rotated in a counter-clockwise direction (arrow 13) smoothing the Wall packed by the packers as the roller head 16 is slowly moved upward (arrow 62), as indicated by the dot-dash line and full-line positions of FIG. 1.

The cement or concrete spreader unit 22 is shown as a sleeve 49 that is telescopically engaged with the hub 29 and is adjustably secured by means of set screws 50 to said hub, a plate 51 Welded to said sleeve to be parallel to the head plate 26, and a set of four cement or concrete slingers 52 mounted on the plate 51. Set screws 53 may be used for securing the sleeve 49 to the spud portion 32 to render the unit 22 stable on the hub 29,

The plate 51, as best seen in FIG. 2, is of smaller diameter than the head plate 26 and is formed to have clearance recesses 54 to freely accommodate the packer units 20 regardless of the eccentric adjustment thereof, as above indicated. The plate 26 is provided with holes 55 that serve as venting or breather holes that obviate trapping air beneath the roller head as the same moves upwardly. Thus, the space beneath the head 16 is at atmospheric pressure and spattering of cement and disturbance, due to pressure due to trapped air, of the troweled surface, marring said surface, is prevented.

The slingers 52 are shown as vanes 56 that may be arranged as desired to engage cement or concrete falling upon the plate 51 and centrifugally sling the same to form a wall to be subsequently packed against the form line 6. Said slingers 52 are shown as radially disposed, but may be disposed at different angles. Also, the bases 57 of the slingers may carry securing bolts 58 that are adjustable in slots 59 in the plate 51.

The modification shown in FIGS. 4, and 6 is similar to the above-described roller head with the exception that instead of the flat plate 51 of the spreader unit 22, the slingers 52 are mounted on a frusto-conical plate 51a to provide a slope down which the aggregate tends to move. This outward and downward slope minimizes compacting of aggregate around the spud portion 32.

This modification also shows guards 65 which are removably fastened to the top of the head plate 26 between the packer units by bolts 66. Said guards are formed as arcuate members having outer walls 67 that overstand the top edge of the skirt 25, thereby minimizing wear on said edge. The ready removability of these guards makes it a simple and relatively inexpensive matter to replace them when worn.

It will be clear that, as the roller head moves slowly upwardly, the same will form a tubular cement or concrete pipe 17, the upper end of which terminates at the shoulder 60 of the split cap ring 61 of the top pallet 10. When the entire roller head 16 is withdrawn from the latter pallet, the form with the cast pipe 17 therein may then be removed and replaced by an empty form preparatory to casting a pipe therein, as above described.

While the foregoing has illustrated and described what is now contemplated to be the best mode of carrying out the invention, the constructions are, of course, subject to modification without departing from the spirit and scope of the invention. Therefore, it is not desired to restrict the invention to the particular forms of construction illustrated and described, but to cover all modifications that may fall within the scope of the appended claims.

Having thus described this invention, what is claimed and desired to be secured by Letters Patent is:

1. A roller head comprising:

(a) a troweling cylinder having a cylindrical skirt provided withinreaching lugs adjacent the upper end thereof,

(b) a head plate across the upper end of said cylinder and bolted to the lugs thereof, venting holes being provided in said plate to vent the interior of the cylinder during vertical movement thereof in a form liner to form a tubular concrete wall in said liner,

(c) a shaft coaxial with the cylinder extending vertically upward from said head plate, said shaft being both rotational to rotate the head plate and the cylinder bolted thereto and vertically movable to move the cylinder upwardly to form said tubular concrete wall,

(d) a plurality of eccentrically adjustable roller packer units on vertical axes in spaced symmetrical circumferential arrangement mounted on and extending upwardly from said head plate to roll against the inner face of the mentioned tubular concrete wall to pack the same tightly against the face of the pipe form liner,

(e) an aggregate spreader plate affixed to said shaft,

spaced above the head plate and provided with peripheral recesses into which the upper ends of said units extend and having spaced relation with the roller packer units to be clear thereof in all eccentric adjustments of said units,

(f) aggregate slingers mounted on said spreader plate to propel aggregate, deposited from above onto the spreader plate, to centrifugally direct aggregate into the path of the roller packer units so the latter and the troweling cylinder form the mentioned tubular concrete Wall,

(g) wear guards provided upon the top of the troweling cylinder in the spaces between the roller packer units,

(h) a stud provided with a tapered portion retained in fixed rotatively adjustable position on the head plate and with an eccentric extension of said tapered portion, and

(i) a roller rotationally mounted on the eccentric extension of the stud with its aggregate-packing surface offset from the troweling surface of the troweling cylinder according to such adjustment.

2. A roller head according to claim 1 in which the head plate and spreader plate are provided With telescopically engaged sleeves for adjusting the spacing of the spreader plate from the header plate, and means to lock the adjustment.

References Cited by the Examiner UNITED STATES PATENTS 1,328,699 1/1920 Vogt 2536 2,178,015 10/1939 'Brunetti 25-36 2,751,657 6/1956 Holston 2536 2,966,766 1/1961 Ronaldson 25104 3,096,556 7/1963 Woods 2536 FOREIGN PATENTS 194,396 4/ 1938 Switzerland. 383,861 1/1965 Switzerland.

1. SPENCER OVERHOLSER, Primary Examiner.

5 R. D. BALDWIN, G. A. KAP, Assistant Examiners. 

1. A ROLLER HEAD COMPRISING: (A) A TROWELING CYLINDER HAVING A CYLINDRICAL SKIRT PROVIDED WITH INREACHING LUGS ADJACENT THE UPPER END THEREOF, (B) A HEAD PLATE ACROSS THE UPPER END OF SAID CYLINDER AND BOLTED TO THE LUGS THEREOF, VENTING HOLES BEING PROVIDED IN SAID PLATE TO VENT THE INTERIOR OF THE CYLINDER DURING VERTICAL MOVEMENT THEREOF IN A FORM LINER TO FORM A TUBULAR CONCRETE WALL IN SAID LINER, (C) A SHAFT COAXIAL WITH THE CYLINDER EXTENDING VERTICALLY UPWARD FROM SAID HEAD PLATE, SAID SHAFT BEING BOTH ROTATIONAL TO ROTATE THE HEAD PLATE AND THE CYLINDER BOLTED THERETO AND VERTICALLY MOVABLE TO MOVE THE CYLINDER UPWARDLY TO FORM SAID TUBULAR CONCRETE WALL, (D) A PLURALITY OF ECCENTRICALLY ADJUSTABLE ROLLER PACKER UNITS ON VERTICAL AXES IN SPACED SYMMETRICAL CIRCUMFERENTIAL ARRANGEMENT MOUNTED ON AND EXTENDING UPWARDLY FROM SAID HEAD PLATE TO ROLL AGAINST THE INNER FACE OF THE MENTIONED TUBULAR CONCRETE WALL TO PACK THE SAME TIGHTLY AGAINST THE FACE OF THE PIPE FORM LINER, (E) AN AGGREGATE SPREADER PLATE AFFIXED TO SAID SHAFT, SPACED ABOVE THE HEAD PLATE AND PROVIDED WITH PERIPHERAL RECESSES INTO WHICH THE UPPER ENDS OF SAID UNITS EXTEND AND HAVING SPACED RELATION WITH THE ROLLER PACKER UNITS TO BE CLEAR THEREOF IN ALL ECCENTRIC ADJUSTMENTS OF SAID UNITS, 